"[In my authoring tool work,] I'm considering building an option of sending a lot of statements for child activities (e.g. questions and possibly even slides). I wonder if there's a way by which I can use the context to report the parent (or grandparent/great-great-great-grandparent) activity without explicitly sending new statements for the parent activity. I need to re-read the context section and see how you've implemented it in the prototypes - its an area I've not really looked at yet. An ability to get data (e.g. duration) from children (or parents) would be nice too e.g. for cases where the parent is a group of courses and wants to calculate its own duration."